We show that this kind of parameter-transfer works reasonably well, though it is important to recognize some of the assumptions that we make in this approach. First, we implicitly assume that the discussion contributed to a post is correlated with features of the post like the title, submitting-user, and community (i.e., subreddit). This can be a difficult assumption to make because identical content is known to receive drastically different attention [1]}. Second, we assume that similar posts should receive similar discussion. This can also be a difficult assumption because of the apparent disconnect between social media popularity and user-preference [2]}.
